<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>使用font-awesome</title>
    <link rel="stylesheet" href="css/font-awesome-4.7.0/css/font-awesome.css">
</head>
<body>
    <i class="fa fa-bar-chart"></i>
</body>
</html>